4. Introduced species (starling, blackbird, Indian mynah)

What evolution is in play in the similarity of Australian birds to the Northern hemisphere?

-• however, these examples illustrate convergent evolution, not relatedness • most Aust spp. are corvids,descended from ancestors of the crow family

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What does corvid mean?

-descended from the ancestors of the crow family

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What is convergent evolution?

-Evolution of similar features in unrelated species-• DNA studies allow origin and evolution to be unravelled• prove that Aust birds not derived from northern hemisphere stock - more closely related to each other than to N.H. look-alikes

What are the five parental care types in birds?

• biparental = both parents stay

• paternal or maternal=only one parent stays

• none

• cooperative= in groups

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What are the surveying techniques for birds?

-census, monitoring-capture and ringing-DNA studies

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What is the Atlas of Australian birds project?

Aim: - collect info on distribution and abundance of Australian birds - involve community-commenced in 1998-voluntary based-Some conclusions:- some supposedly migratory species are not - winter movement of birds from SW & Tasmania to NT